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# JOSE CLI
The `jose-util` command line utility allows for encryption, decryption, signing
and verification of JOSE messages. Its main purpose is to facilitate dealing
with JOSE messages when testing or debugging.
## Usage
The utility includes the subcommands `encrypt`, `decrypt`, `sign`, `verify` and
`expand`. Examples for each command can be found below.
Algorithms are selected via the `--alg` and `--enc` flags, which influence the
`alg` and `enc` headers in respectively. For JWE, `--alg` specifies the key
managment algorithm (e.g. `RSA-OAEP`) and `--enc` specifies the content
encryption algorithm (e.g. `A128GCM`). For JWS, `--alg` specifies the
signature algorithm (e.g. `PS256`).
Input and output files can be specified via the `--in` and `--out` flags.
Either flag can be omitted, in which case `jose-util` uses stdin/stdout for
input/output respectively. By default each command will output a compact
message, but it's possible to get the full serialization by supplying the
`--full` flag.
Keys are specified via the `--key` flag. Supported key types are naked RSA/EC
keys and X.509 certificates with embedded RSA/EC keys. Keys must be in PEM
or DER formats.
## Examples
### Encrypt
Takes a plaintext as input, encrypts, and prints the encrypted message.
jose-util encrypt -k public-key.pem --alg RSA-OAEP --enc A128GCM
### Decrypt
Takes an encrypted message (JWE) as input, decrypts, and prints the plaintext.
jose-util decrypt -k private-key.pem
### Sign
Takes a payload as input, signs it, and prints the signed message with the embedded payload.
jose-util sign -k private-key.pem --alg PS256
### Verify
Reads a signed message (JWS), verifies it, and extracts the payload.
jose-util verify -k public-key.pem
### Expand
Expands a compact message to the full serialization format.
jose-util expand --format JWE # Expands a compact JWE to full format
jose-util expand --format JWS # Expands a compact JWS to full format
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